I found it not in creative lab's website. I tried a lot of drivers from creative's website and couldn't find a driver which supports pci128 (st4750) in XP. but this one really works. I suppose it works in win98, me, 2K, too. You guys can try it.
The following files are found inside the driver download file.
|P128W2K.LIB||363.8 KB||2 Nov 2001|
|SBPCI128Setupus.exe||4.4 MB||2 Nov 2001|